Was polishing and waxing my 1989 300CE and much to my dismay found some rust, albeit very minor.

The first spots were discovered when I removed the rear licence plate. Two small spots less than the size of pea.


The second area I found was on the driver's door just above the lower plastic cladding. Again the spots are quite small, less than the size of a pea but I would like to get them taken care of since the car is otherwise immaculate.

Discovering the rust makes you realize you can't be complacent when owning an older car. The car isn't driven in the winter and I live on the West Coast where salting and sanding is minimal but lots of rain.

Where else should I check for rust on the underside? I've read subframe mounts and jack points are common points. I checked my jack points last years and they are solid. I sprayed rust check in and around the jack tubes at that time.

Do underbody rust sprays such as rust check actually work?

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1989 300CE